Container base



FIG. 1 is a bottom perspective view of a container base showing our newdesign;

FIG. 2 is a bottom plan view thereof; and,

FIG. 3 is a side elevation view thereof.

The evenly dashed broken lines in the drawings are for environmentalpurposes and form no part of the claim. The dot-dot-dash broken lines inthe drawings define the bounds of the claim and form no part thereof.

The ornamental design for a container base, as shown and described.